Black Box MPSH16-D20-120V User Manual

CHAPTER 7: Alarm Configuration

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7.2.1. Over Temperature Alarms - Load Shedding and Auto Recovery
For Over Temperature Alarms, the Load Shedding feature is used to switch specific,

user-defined plugs On or Off whenever temperature exceeds the Alarm Set Threshold

value. This allows the Outlet Managed PDU to automatically shut Off non-

essential devices in order to reduce the temperature generated within the rack, or

automatically switch On devices such as fans or cooling systems in order to dissipate

heat. When the Auto Recovery feature is enabled, the Outlet Managed PDU can also

automatically "undo" the effects of the Load Shedding feature when the temperature

again falls to a user-defined non-critical level.

Note:

Load Shedding Configuration Menus for both the Initial and
Critical Over Temperature Alarms offer essentially the same set of
parameters, but parameters defined for each alarm are separate
and unique. For example, parameters defined for Over Temperature
(Initial) Alarm Load Shedding will not be applied to Over
Temperature (Critical) Alarm Load Shedding and vice versa.

The Load Shedding Configuration menus allow you to defined the following

parameters:

• Unit to Configure: In some compatible power control products, this item is

used to select either a local unit or an auxiliary unit. In Outlet Managed PDU

series products, this option has no function. (Default = Local.)

• Enable: Enables/Disables Load Shedding for the Over Temperature Alarm.

When enabled, the Outlet Managed PDU will switch the user specified plugs

whenever the temperature exceeds the Alarm Set Threshold value.

(Default = Disable.)

• Plug State: Determines whether the selected plugs/plug groups will be

switched On or Off when Load Shedding is enabled and temperature exceeds

the user-defined Alarm Set Threshold. For example, if the Plug State is set

to "Off", then the selected plugs/plug groups will be switched Off when the

Alarm Set Threshold is exceeded. (Default = Off.)